Device for rotating pneumatic drills.



H. J. COOK & H. E. MARSDEN.

DEVICE FOR ROTATING PNEUMATIC DRILLS. APPLICATIUN FILED MAY 19, 1914.1,152,882. Patented sept. 7, 1915.

.HENRY recon, yorros.ansfnnns, cALmomvrA,` Ann HERBERT nrnrnnsnnn, oryyo'rTUr/rwn,"row-.41.`Lr`v i f nnvicn'iron norn'rrnerNnnivIAfrionniLL/s.

4 Specification of Lettersl'fatent;

ratenelea; sepa-7,1915;

n animation fried' may 1e, 1914'. serial nbzssagenf T0 all 'whom t mayconcern. l.

Be it known that wefHNnY 4I.' Coon and HERBERT E. MAnsDnN, citizensofthe United States, residing, respectively, geles, in' `tli`e" `countyof Los" State of California, and Ottumwa, county of Wapello and State ofIowa, have invented new and useful Improvements in Devices for RotatingPneumatic Drills; and we do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates tating pneumatic drills,

The object of the invention resides in the provision of a device of thecharacter n amed through the instrumentality of which a pneumatic drillmaybe rotated during the operation of drilling to assure a perfectlyround hole being drilled and which will enable a horizontal hole to bedrilled without the use of a hollow bit.

A further object of the invention resides in the provision of a deviceof the character named which can be readily associated with a drill ofordinary construction.`

With the above and other objects in view the invention consists in thedetailsof construction and in the arrangement and combination of partsto be hereinafter more fully described and particularly pointed out inthe appended claims. y

In describing the invention in detail reference will be had to theaccompanying drawings wherein like characters, of reference denotecorrespondingfparts in the several views, and in whichl Figure 1 is aview in elevation of a pneumatic drill having the attachment associatedtherewith; Fig. 2, a longitudinal section of what is shown in Fig. 1;Fig. 8, an enlarged section on the line 3-3 of Fig. 1; Fig. 4, anenlarged section on the line 4-4 of Fig. 1; Fig. 5, a perspective viewof the sleeve embodied in the device and which interlocks with the airfeed piston of the drill so that rotation of the sleeve will produce acorresponding rotation of the air feed piston, and Fig. 6, a perspectiveview of the key members which are attached to the sleeve.

Referring to the drawing A indicates generally a pneumatic drill whichincludes an air feed cylinder 10, an air feed hollow pisto devices forroat Los An-` c Angeles aridi" in. the, i.,

toni" 11, af body "12, opera-ting "mechanism 13 withinlthe'fbody; vand a"drill7 14:

The improveddevice'is' shown as coml' prising a tubularmember y1,3formed of sec- 'tions/ '15 andy "116 provided''with flanges y'17 wherebysaid sections may be bolted together upon the drill. The central portionof the bore of the tubular member B is enlarged as at18 for a purposethat will presently appear. The improved device further embodies asleeve 19 engaged upon the air feed piston 11 and having fixed thereon aworm wheel 20. This sleeve 19 is rotatably disposed in thetubular memberB with the worm wheel 20 working in the enlarged portion 1S of the boreof said tubular member. One end of the sleeve 19 is provided with a ange21 disposed eXteriorly of the tubular member Band having securedthereagainst segmental plates 22 provided with keys 23 which engage ingrooves 24 formed in the air feed piston 11 and whereby the rotation ofsaid sleeve will effect a corresponding rotation of the air feed piston11, body 12 and drill 14. Journaled in the tubular member `B andextending transversely thereof is a shaft 25 which has iXed thereonwithin the enlarged portion 18 of the bore of the tubular member a worm26y meshing with the worm wheel20. Fixed on the shaft 25 eXteriorly ofthe tubular member is a crank 27 whereby said shaft may be rotated toeffect a rotation of the sleeve 19. It will be observed in thisconnection however that any other suitable means may be employed torotate the shaft 25.

In the operation of the drill it will ybe obvious that when air isadmitted to the cylinder 10 the piston 11 will be forced longitudinallyso as to move the drill 14 up to the work. The operating mechanismwithin the body 13 will of course be actuated in the usual manner. Viththe parts thus set in` operation it will be obvious that upon effectingrotation of the shaft 25 the piston 11, body 12 and drill 14 will berotated.

What is claimed is 1. The combination with a pneumatic drill includingan air feed cylinder and an air feed piston disposed within thecylinder, said piston being provided with a longitudinal groove, atubular member fixed to the air feed cylinder, a sleeve rotatablymounted in the tubular member, a key carried by said sleeve and engagedin said groove whereby the sleeve and piston are non-r0ta ablyconnected, and means for rotating said tably and slidably connected, andmeans for sleeve. 15 rotating said sleeve. v kIn testimony whereof, Weaiix our signa- 2. The combination with a pneumatic drill tures, in thepresence of tWo Witnesses. 5 including an air feed cylinder and an airfeed piston movable Within the cylinder,

said piston being provided With a longitudinal groove, a tubular memberfixed to the VWitnesses for Cook:

air feed cylinder, a sleeve rotatably mounted G. C. FARMER,

10 in the tubular member, a sectional ring se- AMIE L'. MOLLER.

cured to one end of the sleeve and having a Witnesses for Marsden: keyengaged in said groove whereby, the FRANK R. WILLIAMS, sleeve and pistonare non-rotatably and slid- A. P. MURPHY.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents', Washington, D. C.

